JPH0242346Y2 - - Google Patents
Info
- Publication number
- JPH0242346Y2 JPH0242346Y2 JP1985125176U JP12517685U JPH0242346Y2 JP H0242346 Y2 JPH0242346 Y2 JP H0242346Y2 JP 1985125176 U JP1985125176 U JP 1985125176U JP 12517685 U JP12517685 U JP 12517685U JP H0242346 Y2 JPH0242346 Y2 JP H0242346Y2
- Authority
- JP
- Japan
- Prior art keywords
- semicircular
- pipe
- lateral direction
- downward
- circular pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000003825 pressing Methods 0.000 claims description 21
- 238000005452 bending Methods 0.000 claims description 6
- 230000000994 depressogenic effect Effects 0.000 claims description 2
- 230000013011 mating Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、円形パイプの軸線方向中間部に別の
パイプや軸受筒等の相手部材を直交状態で溶接す
るために、該中間部に相手部材の受け部として円
形パイプの軸線方向に直交する横方から見て下方
に窪だ凹部を成形する金型に関し、特に自動二輪
車のパイプフレームの製造工程で使用されるもの
に関する。[Detailed description of the invention] (Field of industrial application) The present invention is designed to weld a mating member such as another pipe or a bearing sleeve orthogonally to the axially intermediate part of a circular pipe. The present invention relates to a mold for forming a downward concave portion as a receiving portion of a circular pipe when viewed from the side perpendicular to the axial direction of a circular pipe, and particularly relates to a mold used in the manufacturing process of a pipe frame of a motorcycle.
（柔来の技術）
従来は、第１０図に示すように、パイプはダイ
１′とパンチ２′の間で反転屈曲部b′が折れ曲つた
状態に曲げられており、加工されるパイプの引張
り強度は40〜50Kg／mm2であつた。(Soft technology) Conventionally, as shown in Fig. 10, the pipe is bent between the die 1' and the punch 2' so that the inverted bent part b' is bent. The tensile strength was 40-50 Kg/ mm2 .
（考案が解決しようとする問題点）
近年、車両の軽量化のために引張り強度60Kg／
mm2程度のフレームパイプを使用する必要がある
が、このパイプを第１０図のように加工すると、
反転屈曲部b′の曲りが急なため、ここに亀裂が入
るおそれがあり、又反転屈曲部b′がパイプＰに溶
接すべき相手部材の接合部となるため、該屈曲部
b′の曲りが急になると相手部材との接合面積が減
少してしまう。(Problem that the invention aims to solve) In recent years, in order to reduce the weight of vehicles, tensile strength of 60 kg/
It is necessary to use a frame pipe of about mm 2 , but if this pipe is processed as shown in Figure 10,
Since the reverse bending part b' has a sharp bend, there is a risk of cracks forming here, and since the reverse bending part b' becomes the joint part of the mating member to be welded to the pipe P, the bending part
If the curve b' becomes steep, the joint area with the mating member will decrease.
本考案は、以上の点に鑑み、反転屈曲部を大き
な曲率で屈曲させて亀裂の発生を防止し、且つ反
転屈曲部の頂面を円筒面に押圧成形して相手部材
との接合面積を大きく取れるようにした金型を提
供することを目的としている。 In view of the above points, the present invention prevents the occurrence of cracks by bending the reverse bent part with a large curvature, and also press-forms the top surface of the reverse bent part into a cylindrical surface to increase the joint area with the mating member. The purpose is to provide molds that can be removed.
（課題を解決するための手段）
上記目的を達成すべく、本考案では、円形パイ
プＰの軸線方向中間に、軸線に直交する横方向か
ら見て下方に窪だ凹部を成形する金型であつて、
下側のダイ１と上側のパンチ５とを備え、パイプ
軸線に直交する断面を縦断面としてダイ１に、円
形パイプＰを支持する縦断面形状が半円形の半円
部２と該半円部２の上方に直状にのびる導入部３
とから成る溝４を形成するものにおいて、パンチ
５に縦断面形状が半円形で横方向から見て下方に
凸に湾曲した半円部６と該半円部６から上方に直
状にのびる延長部７とから成つて円形パイプＰの
上半部をその母線に沿つて下方に押し潰す第１押
圧部８と、前記延長部７の上端の横方向両側に突
出し且つ横方向から見て下方に凸の円弧状に湾曲
する段部９，９をもち、前記第１押圧部８による
円形パイプＰの押し潰しによつて生ずる該パイプ
Ｐの横方向両側の反転屈曲部ｂを該段部９によつ
て下方に押圧する第２押圧部１０とを形成し、且
つ前記延長部７の横幅を、該延長部７の側面とダ
イ１の溝４の側面との間に、前記反転屈曲部ｂを
内部に空間ｃを残した大きな曲率で屈曲させるの
に必要な間隙Ａが形成されるように設定した。(Means for Solving the Problems) In order to achieve the above object, the present invention is a mold for forming a concave portion in the axial direction middle of the circular pipe P, which is concave downward when viewed from the lateral direction orthogonal to the axis. hand,
The die 1 includes a lower die 1 and an upper punch 5, and the die 1 has a semicircular part 2 with a semicircular longitudinal cross section that supports a circular pipe P and the semicircular part. Introductory part 3 extending straight above 2
In the punch 5, the punch 5 has a semicircular section 6 having a semicircular longitudinal section and a convex downward curve when viewed from the lateral direction, and an extension extending linearly upward from the semicircular section 6. a first pressing part 8 which crushes the upper half of the circular pipe P downward along its generatrix; It has step portions 9, 9 which are curved in a convex arc shape, and the reversal bent portions b on both sides of the pipe P in the lateral direction, which are generated by crushing the circular pipe P by the first pressing portion 8, are attached to the step portion 9. Thus, a second pressing portion 10 that presses downward is formed, and the width of the extension portion 7 is such that the inverted bent portion b is formed between the side surface of the extension portion 7 and the side surface of the groove 4 of the die 1. It was set so that a gap A necessary for bending with a large curvature leaving a space c inside was formed.
（作用）
パンチ２の下降によつて、パイプＰの母線は、
第１押圧部８の半円部６に押されて凹み、パイプ
Ｐの上半部は下向きに反転する。このとき、第１
押圧部８の延長部７とダイ１の溝４の側面との間
に大きな間隙Ａがあるため、反転屈曲部ｂは、逆
Ｕ字状に大きな曲率半径で曲がるため、亀裂は入
らない。反転屈曲部ｂは更に第２押圧部１０の段
部９で押圧されて、該屈曲部ｂの頂面が横方向に
平坦な円筒面に押圧成形され、直交して固定され
るパイプや軸受筒との接合面積が大きくなる。(Function) As the punch 2 descends, the generatrix of the pipe P becomes
The pipe P is depressed by being pushed by the semicircular part 6 of the first pressing part 8, and the upper half of the pipe P is reversed downward. At this time, the first
Since there is a large gap A between the extension part 7 of the pressing part 8 and the side surface of the groove 4 of the die 1, the inverted bent part b is bent in an inverted U shape with a large radius of curvature, so that no cracks occur. The reverse bent part b is further pressed by the step part 9 of the second pressing part 10, so that the top surface of the bent part b is press-formed into a laterally flat cylindrical surface, and the pipe or bearing sleeve is fixed orthogonally. The bonding area with the
（実施例）
図において、１はダイで、半径Ｒの半円部２と
これに続く導入部３とからなる溝４をもつ。パン
チ５は、半円部６とこれに続く直上の延長部７と
からなる第１押圧部８と、延長部６の両側に突出
する段部９をもち該段部９によつてパイプＰの反
転屈曲部ｂを押圧する第２押圧部１０とを備え
る。ダイ１の溝４の側面すなわち半円部２の上部
及び導入部３とパンチ５の延長部７との間には十
分な間隙Ａを形成するように延長部７の横幅は狭
く作られる。この間隙Ａの大きさは、反転屈曲部
ｂが逆Ｕ字状をなして内部に大きな空間ｃが形成
できるような寸法にする。半円部６の半径r1は、
おおむねダイ１の半円部２の半径ＲからパイプＰ
の肉厚の３倍値を差引いた値とする。(Example) In the figure, 1 is a die, which has a groove 4 consisting of a semicircular part 2 with a radius R and an introduction part 3 following the semicircular part 2. The punch 5 has a first pressing part 8 consisting of a semicircular part 6 and an extension part 7 immediately above the semicircular part 6, and a step part 9 that projects on both sides of the extension part 6. It includes a second pressing part 10 that presses the reverse bent part b. The width of the extension part 7 is made narrow so as to form a sufficient gap A between the side surface of the groove 4 of the die 1, that is, the upper part of the semicircular part 2, the introduction part 3, and the extension part 7 of the punch 5. The size of this gap A is such that the reverse bent portion b forms an inverted U-shape and a large space c is formed inside. The radius r 1 of the semicircular part 6 is
Approximately from the radius R of the semicircular part 2 of the die 1 to the pipe P
The value obtained by subtracting 3 times the wall thickness of
また、第１押圧部８及び第２押圧部１０の側面
形状は、第２図に示すとおりで、第２押圧部１０
の側面曲率半径r2は直交して取付けるべき部材の
半径に近い値とし、第１押圧部８はr2よりも小さ
い曲率半径r3をもつ卵頭形となつている。 Further, the side shapes of the first pressing part 8 and the second pressing part 10 are as shown in FIG.
The radius of curvature r 2 of the side surface is set to a value close to the radius of the member to be mounted perpendicularly, and the first pressing portion 8 is oval-shaped with a radius of curvature r 3 smaller than r 2 .
次に作用を説明する。ダイ１の溝４にパイプＰ
を置き、パンチ５を下降させると、第１押圧部８
に押されてパイプＰの母線は、線ａで示すように
長手方向で広い範囲にわたつて凹んで反転し、反
転屈曲縁ｂも線ａに近い長さとなる。次に、第２
押圧部１０の段部９が反転屈曲縁ｂを押圧して円
筒面ｄを形成するが、このとき第１押圧部８の半
円部６によつて変形を受けたパイプＰの最大変形
部は、第６図に示すようにパイプ内面が密接する
ようにしてもよいし、第７図に示すように隙間を
保つようにしてもよい。これは第１押圧部８の長
さできまり、その長さは変形量の所望値により適
宜きめられる。しかし、いずれの場合も反転屈曲
縁ｂは空間ｃが残るように大きな曲率半径で成形
され、次いで第２押圧部１０による円筒内面ｄの
成形が行われ、これらの成形はパンチの１ストロ
ークで完了する。 Next, the effect will be explained. Pipe P in groove 4 of die 1
When the punch 5 is lowered, the first pressing part 8
, the generatrix of the pipe P is concave and inverted over a wide range in the longitudinal direction as shown by line a, and the inverted bent edge b also has a length close to line a. Next, the second
The stepped portion 9 of the pressing portion 10 presses the reverse bent edge b to form the cylindrical surface d, but at this time, the maximum deformed portion of the pipe P deformed by the semicircular portion 6 of the first pressing portion 8 is The inner surfaces of the pipes may be brought into close contact with each other as shown in FIG. 6, or a gap may be maintained as shown in FIG. This is determined by the length of the first pressing portion 8, and the length is appropriately determined depending on the desired amount of deformation. However, in either case, the inverted bent edge b is formed with a large radius of curvature so that a space c remains, and then the cylindrical inner surface d is formed by the second pressing part 10, and this forming is completed with one stroke of the punch. do.
第８図は成形後のパイプの側面を示し最大変形
部におけるパイプ断面の変化を二点鎖線で示して
ある。 FIG. 8 shows the side surface of the pipe after molding, and the change in the cross section of the pipe at the maximum deformation portion is indicated by a chain double-dashed line.
そしてこのパイプ上に第９図で示すように軸受
円筒又はパイプＱが直交して載置されて溶接さ
れ、更にステイＳを溶接して固定させる。 Then, as shown in FIG. 9, a bearing cylinder or a pipe Q is orthogonally placed and welded onto this pipe, and a stay S is further welded and fixed.
（考案の効果）
本考案の金型の使用により、パイプの反転屈曲
部ｂの曲率半径を大きく成形できるため該反転屈
曲部ｂに成形加工による亀裂が入ることがないと
共に、反転屈曲部の頂面を円筒面に成形すること
ができるため取付けるべきパイプ等の接合面積を
大きくすることができ、しかも、これらの成形加
工を１ストロークで行うことができる。(Effects of the invention) By using the mold of the present invention, the radius of curvature of the inverted bent part b of the pipe can be formed to be large, so that cracks do not occur in the inverted bent part b due to the forming process, and the top of the inverted bent part Since the surface can be formed into a cylindrical surface, the joint area for pipes, etc. to be attached can be increased, and furthermore, these forming processes can be performed in one stroke.
第１図ないし第６図は本考案の金型の一実施例
を示し、第１図はパンチの正面図、第２図は側面
図、第３図は底面図、第４図はダイの平面図、第
５図は正面図、第６図は加工状態を示す縦断面
図、第７図は別の実施例の加工状態を示す縦断面
図、第８図は成形加工後のパイプの側面図、第９
図は軸受筒溶接後の側面図、第１０図は従来の金
型による加工状態を示す縦断面図である。
１……ダイス、４……溝、６……半円部、７…
…延長部、８……第１押圧部、９……段部、１０
……第２押圧部。
Figures 1 to 6 show an embodiment of the mold of the present invention, with Figure 1 being a front view of the punch, Figure 2 being a side view, Figure 3 being a bottom view, and Figure 4 being a plan view of the die. Fig. 5 is a front view, Fig. 6 is a longitudinal sectional view showing the processing state, Fig. 7 is a longitudinal sectional view showing the processing state of another embodiment, and Fig. 8 is a side view of the pipe after forming. , No. 9
The figure is a side view after welding the bearing tube, and FIG. 10 is a longitudinal cross-sectional view showing the state of processing using a conventional mold. 1...Dice, 4...Groove, 6...Semicircular part, 7...
...Extension part, 8...First pressing part, 9...Step part, 10
...Second pressing section.
Claims (1)
る横方向から見て下方に窪んだ凹部を成形する金
型であつて、下側のダイ１と上側のパンチ５とを
備え、パイプ軸線に直交する断面を縦断面とし
て、ダイ１に、円形パイプＰを支持する縦断面形
状が半円形の半円部２とを該半円部２の上方に直
状にのびる導入部３とから成る溝４を形成するも
のにおいて、パンチ５に、縦断面形状が半円形で
横方向から見て下方に凸に湾曲した半円部６と該
半円部６から上方に直状にのびる延長部７とから
成つて円形パイプＰの上半部をその母線に沿つて
下方に押し潰す第１押圧部８と、前記延長部７の
上端の横方向両側に突出し且つ横方向から見て下
方に凸の円弧状に湾曲する段部９，９をもち、前
記第１押圧部８による円形パイプＰの押し潰しに
よつて生ずる該パイプＰの横方向両側の反転屈曲
部ｂを該段部９によつて下方に押圧する第２押圧
部１０とを形成し、且つ前記延長部７の横幅を、
該延長部７の側面とダイ１の溝４の側面との間
に、前記反転屈曲部ｂを内部に空間ｃを残した大
きな曲率で屈曲させるのに必要な間隙Ａが形成さ
れるように設定したことを特徴とする円形パイプ
に凹部を成形する金型。 A mold for forming a concave portion depressed downward when viewed from a lateral direction perpendicular to the axis in the axial direction middle of a circular pipe P, comprising a lower die 1 and an upper punch 5, and perpendicular to the pipe axis. A groove 4 is formed in the die 1, which includes a semicircular part 2 with a semicircular vertical cross section that supports the circular pipe P, and an introduction part 3 extending straight above the semicircular part 2. In the punch 5, the punch 5 includes a semicircular part 6 having a semicircular longitudinal cross-sectional shape and convexly curved downward when viewed from the lateral direction, and an extension part 7 extending linearly upward from the semicircular part 6. a first pressing part 8 that crushes the upper half of the circular pipe P downward along its generatrix; and a circular arc shape that protrudes on both sides in the lateral direction of the upper end of the extension part 7 and is convex downward when viewed from the lateral direction. It has step portions 9, 9 which are curved in a direction, and the reversal bent portions b on both sides of the pipe P in the lateral direction, which are caused by the crushing of the circular pipe P by the first pressing portion 8, are bent downward by the step portions 9. The second pressing part 10 is formed to press, and the width of the extension part 7 is
A gap A is formed between the side surface of the extension part 7 and the side surface of the groove 4 of the die 1, which is necessary for bending the reverse bent part b with a large curvature leaving a space c inside. A mold for forming a recess into a circular pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985125176U JPH0242346Y2 (en) | 1985-08-16 | 1985-08-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985125176U JPH0242346Y2 (en) | 1985-08-16 | 1985-08-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6234933U JPS6234933U (en) | 1987-03-02 |
| JPH0242346Y2 true JPH0242346Y2 (en) | 1990-11-13 |
Family
ID=31017853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985125176U Expired JPH0242346Y2 (en) | 1985-08-16 | 1985-08-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0242346Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0735618Y2 (en) * | 1989-06-23 | 1995-08-16 | アラコ株式会社 | Pipe crushing device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54123568A (en) * | 1978-03-20 | 1979-09-25 | Yamaha Motor Co Ltd | Finishing of pipe connecting end portion |
-
1985
- 1985-08-16 JP JP1985125176U patent/JPH0242346Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54123568A (en) * | 1978-03-20 | 1979-09-25 | Yamaha Motor Co Ltd | Finishing of pipe connecting end portion |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6234933U (en) | 1987-03-02 |
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